Made from heated volcanic rock, perlite is an ideal complement to all types of substrate (mix 10 to 15%). Plagron guarantees the consistent quality of its substrate (3-4mm grain size), which contains no pathogens while maintaining an ideal air/water ratio. Perlite stimulates root development.
This Plagron perlite bears the RHP label. Store it in a dry place away from light.
Wearing a dust mask is recommended during mixing operations.NF U44-551 Growing Medium
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